Title: Bit error rate performance analysis of Cholesky decomposition based quasi ML receiver for large scale MIMO system

Authors: M. Kasiselvanathan; N. Sathish Kumar

Addresses: Electronics and Communication Engineering, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, 641 022, India ' Electronics and Communication Engineering, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, 641 022, India

Abstract: Large scale multiple input multiple output (LS-MIMO) system is an emerging technology that has large antennas at both transmitter and receiver. In this paper, a novel approach is proposed namely Cholesky Decomposition based quasi maximum likelihood (ML) detector followed by list sequential (LISS) decoder (Quasi ML-LISS) receiver for LS-MIMO system. The refined empirical log-likelihood ratio (RELLR) generated by ML soft detector is decoded by using LISS decoder. The performance of the receiver is enhanced for turbo coded MIMO system by generating the RELLR at the detector output for higher order modulation. Simulation results show that bit error rate (BER) performance of proposed receiver is closer to the ML performance and superior to the multiple stage (MS) receiver.

Keywords: BER; bit error rate; QAM; quadrature amplitude modulation; maximum likelihood; MIMO; multiple input multiple output; signal detection.

DOI: 10.1504/EG.2017.088001

Electronic Government, an International Journal, 2017 Vol.13 No.4, pp.306 - 313

Received: 10 Apr 2017
Accepted: 02 May 2017

Published online: 04 Nov 2017 *

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